But Donald Trump’s not a marginal force in the race. Some individual polls now have him leading the GOP contest – and he's gaining. Views of Mr. Trump are getting more favorable even among GOP voters who don’t back him.

President Obama said he made it a general policy to not comment on the specifics of cases still in the courts. Then, he said: 'I think this country, any civilized country, should have no tolerance for rape.'

NASA hopes that the planned Orion manned capsule will carry astronauts to the moon, or Mars. But its first manned test flight isn’t scheduled until 2021. Forty-six years ago to the day, Apollo 11 astronauts landed on the moon.

So far John McCain is taking the high road after Donald Trump's weekend criticism of McCain's military service. On NBC, McCain said Trump doesn’t owe him an apology – but he does owe one to the nation's POWs.

The spat between Donald Trump and John McCain makes for great political theater. But the dispute, prompted by an exchange of insults, reveals a deeper question for their generation: What did you do during the Vietnam War?

Now that an Iran nuclear deal has been worked out, the political selling job begins. A plurality of Americans support the agreement, but most are not confident that Iran can be prevented from producing nuclear weapons.

At the top of Monday's address, Hillary Clinton said that the measure of economic success shouldn’t be 'just some arbitrary growth targets untethered to people’s lives and livelihoods' – that is, not Jeb Bush's 4 percent target.

Billionaire developer and TV personality Donald Trump is known for generating outrage when commenting on just about anything, most recently immigration. Now that he’s a presidential candidate, fact-checkers are examining his rhetorical record.

Democrats say that Jeb Bush's comment that 'people need to work longer hours' is a slam at American workers and the first real gaffe of his campaign. Bush says he meant that part-time workers should be able to go full time if they want.

Conflicts Donald Trump created with his negative comments about Mexican immigration and other issues are likely to get worse. Other Republican presidential candidates are scrambling to distance themselves from Trump.